fix: honor registered DeepSeek endpoint

server-tools/bingshuo-tcs-controller/model-client.test.mjs

@@ -1,12 +1,27 @@
 import assert from "node:assert/strict";
 import test from "node:test";
-import { DeepSeekJsonClient, extractJson } from "./model-client.mjs";
+import {
+  DeepSeekJsonClient,
+  completionEndpoint,
+  extractJson,
+} from "./model-client.mjs";
 
 test("extractJson accepts strict JSON and fenced JSON", () => {
   assert.deepEqual(extractJson('{"ok":true}'), { ok: true });
   assert.deepEqual(extractJson('```json\n{"ok":true}\n```'), { ok: true });
 });
 
+test("completionEndpoint accepts either a base URL or a complete registered endpoint", () => {
+  assert.equal(
+    completionEndpoint("https://api.deepseek.com/v1"),
+    "https://api.deepseek.com/v1/chat/completions",
+  );
+  assert.equal(
+    completionEndpoint("https://api.deepseek.com/chat/completions"),
+    "https://api.deepseek.com/chat/completions",
+  );
+});
+
 test("DeepSeek client sends the secret only as authorization and returns JSON", async () => {
   let observed;
   const client = new DeepSeekJsonClient({